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Merge branch 'x86-reboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / xfs / xfs_ioctl.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
35 #include "xfs_attr.h"
36 #include "xfs_bmap.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_utils.h"
39 #include "xfs_dfrag.h"
40 #include "xfs_fsops.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_discard.h"
43 #include "xfs_quota.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_export.h"
46 #include "xfs_trace.h"
47
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
55
56 /*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
67 int
68 xfs_find_handle(
69 unsigned int cmd,
70 xfs_fsop_handlereq_t *hreq)
71 {
72 int hsize;
73 xfs_handle_t handle;
74 struct inode *inode;
75 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
79
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
82 if (!file)
83 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
90 }
91 ip = XFS_I(inode);
92
93 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
100
101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
106
107
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
117 int lock_mode;
118
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
130 error = -EFAULT;
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
134
135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
143 }
144
145 /*
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
148 */
149 STATIC int
150 xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
153 {
154 return 1;
155 }
156
157 /*
158 * Convert userspace handle data into a dentry.
159 */
160 struct dentry *
161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165 {
166 xfs_handle_t handle;
167 struct xfs_fid64 fid;
168
169 /*
170 * Only allow handle opens under a directory.
171 */
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
174
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
182
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
186
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190 }
191
192 STATIC struct dentry *
193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196 {
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
198 }
199
200 int
201 xfs_open_by_handle(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
204 {
205 const struct cred *cred = current_cred();
206 int error;
207 int fd;
208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
212 fmode_t fmode;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
216
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
226 }
227
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
230 #endif
231
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
238 }
239
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
243 }
244
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
249 }
250
251 fd = get_unused_fd();
252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
255 }
256
257 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
258 hreq->oflags, cred);
259 if (IS_ERR(filp)) {
260 put_unused_fd(fd);
261 return PTR_ERR(filp);
262 }
263
264 if (S_ISREG(inode->i_mode)) {
265 filp->f_flags |= O_NOATIME;
266 filp->f_mode |= FMODE_NOCMTIME;
267 }
268
269 fd_install(fd, filp);
270 return fd;
271
272 out_dput:
273 dput(dentry);
274 return error;
275 }
276
277 /*
278 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
279 * unused first argument.
280 */
281 STATIC int
282 do_readlink(
283 char __user *buffer,
284 int buflen,
285 const char *link)
286 {
287 int len;
288
289 len = PTR_ERR(link);
290 if (IS_ERR(link))
291 goto out;
292
293 len = strlen(link);
294 if (len > (unsigned) buflen)
295 len = buflen;
296 if (copy_to_user(buffer, link, len))
297 len = -EFAULT;
298 out:
299 return len;
300 }
301
302
303 int
304 xfs_readlink_by_handle(
305 struct file *parfilp,
306 xfs_fsop_handlereq_t *hreq)
307 {
308 struct dentry *dentry;
309 __u32 olen;
310 void *link;
311 int error;
312
313 if (!capable(CAP_SYS_ADMIN))
314 return -XFS_ERROR(EPERM);
315
316 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
317 if (IS_ERR(dentry))
318 return PTR_ERR(dentry);
319
320 /* Restrict this handle operation to symlinks only. */
321 if (!S_ISLNK(dentry->d_inode->i_mode)) {
322 error = -XFS_ERROR(EINVAL);
323 goto out_dput;
324 }
325
326 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
327 error = -XFS_ERROR(EFAULT);
328 goto out_dput;
329 }
330
331 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
332 if (!link) {
333 error = -XFS_ERROR(ENOMEM);
334 goto out_dput;
335 }
336
337 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
338 if (error)
339 goto out_kfree;
340 error = do_readlink(hreq->ohandle, olen, link);
341 if (error)
342 goto out_kfree;
343
344 out_kfree:
345 kfree(link);
346 out_dput:
347 dput(dentry);
348 return error;
349 }
350
351 STATIC int
352 xfs_fssetdm_by_handle(
353 struct file *parfilp,
354 void __user *arg)
355 {
356 int error;
357 struct fsdmidata fsd;
358 xfs_fsop_setdm_handlereq_t dmhreq;
359 struct dentry *dentry;
360
361 if (!capable(CAP_MKNOD))
362 return -XFS_ERROR(EPERM);
363 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
364 return -XFS_ERROR(EFAULT);
365
366 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
367 if (IS_ERR(dentry))
368 return PTR_ERR(dentry);
369
370 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
371 error = -XFS_ERROR(EPERM);
372 goto out;
373 }
374
375 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
376 error = -XFS_ERROR(EFAULT);
377 goto out;
378 }
379
380 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
381 fsd.fsd_dmstate);
382
383 out:
384 dput(dentry);
385 return error;
386 }
387
388 STATIC int
389 xfs_attrlist_by_handle(
390 struct file *parfilp,
391 void __user *arg)
392 {
393 int error = -ENOMEM;
394 attrlist_cursor_kern_t *cursor;
395 xfs_fsop_attrlist_handlereq_t al_hreq;
396 struct dentry *dentry;
397 char *kbuf;
398
399 if (!capable(CAP_SYS_ADMIN))
400 return -XFS_ERROR(EPERM);
401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
402 return -XFS_ERROR(EFAULT);
403 if (al_hreq.buflen > XATTR_LIST_MAX)
404 return -XFS_ERROR(EINVAL);
405
406 /*
407 * Reject flags, only allow namespaces.
408 */
409 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
410 return -XFS_ERROR(EINVAL);
411
412 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
413 if (IS_ERR(dentry))
414 return PTR_ERR(dentry);
415
416 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
417 if (!kbuf)
418 goto out_dput;
419
420 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
421 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
422 al_hreq.flags, cursor);
423 if (error)
424 goto out_kfree;
425
426 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
427 error = -EFAULT;
428
429 out_kfree:
430 kfree(kbuf);
431 out_dput:
432 dput(dentry);
433 return error;
434 }
435
436 int
437 xfs_attrmulti_attr_get(
438 struct inode *inode,
439 unsigned char *name,
440 unsigned char __user *ubuf,
441 __uint32_t *len,
442 __uint32_t flags)
443 {
444 unsigned char *kbuf;
445 int error = EFAULT;
446
447 if (*len > XATTR_SIZE_MAX)
448 return EINVAL;
449 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
450 if (!kbuf) {
451 kbuf = kmem_zalloc_large(*len);
452 if (!kbuf)
453 return ENOMEM;
454 }
455
456 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
457 if (error)
458 goto out_kfree;
459
460 if (copy_to_user(ubuf, kbuf, *len))
461 error = EFAULT;
462
463 out_kfree:
464 if (is_vmalloc_addr(kbuf))
465 kmem_free_large(kbuf);
466 else
467 kmem_free(kbuf);
468 return error;
469 }
470
471 int
472 xfs_attrmulti_attr_set(
473 struct inode *inode,
474 unsigned char *name,
475 const unsigned char __user *ubuf,
476 __uint32_t len,
477 __uint32_t flags)
478 {
479 unsigned char *kbuf;
480 int error = EFAULT;
481
482 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
483 return EPERM;
484 if (len > XATTR_SIZE_MAX)
485 return EINVAL;
486
487 kbuf = memdup_user(ubuf, len);
488 if (IS_ERR(kbuf))
489 return PTR_ERR(kbuf);
490
491 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
492
493 return error;
494 }
495
496 int
497 xfs_attrmulti_attr_remove(
498 struct inode *inode,
499 unsigned char *name,
500 __uint32_t flags)
501 {
502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
503 return EPERM;
504 return xfs_attr_remove(XFS_I(inode), name, flags);
505 }
506
507 STATIC int
508 xfs_attrmulti_by_handle(
509 struct file *parfilp,
510 void __user *arg)
511 {
512 int error;
513 xfs_attr_multiop_t *ops;
514 xfs_fsop_attrmulti_handlereq_t am_hreq;
515 struct dentry *dentry;
516 unsigned int i, size;
517 unsigned char *attr_name;
518
519 if (!capable(CAP_SYS_ADMIN))
520 return -XFS_ERROR(EPERM);
521 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
522 return -XFS_ERROR(EFAULT);
523
524 /* overflow check */
525 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
526 return -E2BIG;
527
528 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
529 if (IS_ERR(dentry))
530 return PTR_ERR(dentry);
531
532 error = E2BIG;
533 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
534 if (!size || size > 16 * PAGE_SIZE)
535 goto out_dput;
536
537 ops = memdup_user(am_hreq.ops, size);
538 if (IS_ERR(ops)) {
539 error = PTR_ERR(ops);
540 goto out_dput;
541 }
542
543 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
544 if (!attr_name)
545 goto out_kfree_ops;
546
547 error = 0;
548 for (i = 0; i < am_hreq.opcount; i++) {
549 ops[i].am_error = strncpy_from_user((char *)attr_name,
550 ops[i].am_attrname, MAXNAMELEN);
551 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
552 error = -ERANGE;
553 if (ops[i].am_error < 0)
554 break;
555
556 switch (ops[i].am_opcode) {
557 case ATTR_OP_GET:
558 ops[i].am_error = xfs_attrmulti_attr_get(
559 dentry->d_inode, attr_name,
560 ops[i].am_attrvalue, &ops[i].am_length,
561 ops[i].am_flags);
562 break;
563 case ATTR_OP_SET:
564 ops[i].am_error = mnt_want_write_file(parfilp);
565 if (ops[i].am_error)
566 break;
567 ops[i].am_error = xfs_attrmulti_attr_set(
568 dentry->d_inode, attr_name,
569 ops[i].am_attrvalue, ops[i].am_length,
570 ops[i].am_flags);
571 mnt_drop_write_file(parfilp);
572 break;
573 case ATTR_OP_REMOVE:
574 ops[i].am_error = mnt_want_write_file(parfilp);
575 if (ops[i].am_error)
576 break;
577 ops[i].am_error = xfs_attrmulti_attr_remove(
578 dentry->d_inode, attr_name,
579 ops[i].am_flags);
580 mnt_drop_write_file(parfilp);
581 break;
582 default:
583 ops[i].am_error = EINVAL;
584 }
585 }
586
587 if (copy_to_user(am_hreq.ops, ops, size))
588 error = XFS_ERROR(EFAULT);
589
590 kfree(attr_name);
591 out_kfree_ops:
592 kfree(ops);
593 out_dput:
594 dput(dentry);
595 return -error;
596 }
597
598 int
599 xfs_ioc_space(
600 struct xfs_inode *ip,
601 struct inode *inode,
602 struct file *filp,
603 int ioflags,
604 unsigned int cmd,
605 xfs_flock64_t *bf)
606 {
607 int attr_flags = 0;
608 int error;
609
610 /*
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
613 */
614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
615 !capable(CAP_SYS_ADMIN))
616 return -XFS_ERROR(EPERM);
617
618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
619 return -XFS_ERROR(EPERM);
620
621 if (!(filp->f_mode & FMODE_WRITE))
622 return -XFS_ERROR(EBADF);
623
624 if (!S_ISREG(inode->i_mode))
625 return -XFS_ERROR(EINVAL);
626
627 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
628 attr_flags |= XFS_ATTR_NONBLOCK;
629
630 if (filp->f_flags & O_DSYNC)
631 attr_flags |= XFS_ATTR_SYNC;
632
633 if (ioflags & IO_INVIS)
634 attr_flags |= XFS_ATTR_DMI;
635
636 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
637 return -error;
638 }
639
640 STATIC int
641 xfs_ioc_bulkstat(
642 xfs_mount_t *mp,
643 unsigned int cmd,
644 void __user *arg)
645 {
646 xfs_fsop_bulkreq_t bulkreq;
647 int count; /* # of records returned */
648 xfs_ino_t inlast; /* last inode number */
649 int done;
650 int error;
651
652 /* done = 1 if there are more stats to get and if bulkstat */
653 /* should be called again (unused here, but used in dmapi) */
654
655 if (!capable(CAP_SYS_ADMIN))
656 return -EPERM;
657
658 if (XFS_FORCED_SHUTDOWN(mp))
659 return -XFS_ERROR(EIO);
660
661 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
662 return -XFS_ERROR(EFAULT);
663
664 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
665 return -XFS_ERROR(EFAULT);
666
667 if ((count = bulkreq.icount) <= 0)
668 return -XFS_ERROR(EINVAL);
669
670 if (bulkreq.ubuffer == NULL)
671 return -XFS_ERROR(EINVAL);
672
673 if (cmd == XFS_IOC_FSINUMBERS)
674 error = xfs_inumbers(mp, &inlast, &count,
675 bulkreq.ubuffer, xfs_inumbers_fmt);
676 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
677 error = xfs_bulkstat_single(mp, &inlast,
678 bulkreq.ubuffer, &done);
679 else /* XFS_IOC_FSBULKSTAT */
680 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
681 sizeof(xfs_bstat_t), bulkreq.ubuffer,
682 &done);
683
684 if (error)
685 return -error;
686
687 if (bulkreq.ocount != NULL) {
688 if (copy_to_user(bulkreq.lastip, &inlast,
689 sizeof(xfs_ino_t)))
690 return -XFS_ERROR(EFAULT);
691
692 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
693 return -XFS_ERROR(EFAULT);
694 }
695
696 return 0;
697 }
698
699 STATIC int
700 xfs_ioc_fsgeometry_v1(
701 xfs_mount_t *mp,
702 void __user *arg)
703 {
704 xfs_fsop_geom_t fsgeo;
705 int error;
706
707 error = xfs_fs_geometry(mp, &fsgeo, 3);
708 if (error)
709 return -error;
710
711 /*
712 * Caller should have passed an argument of type
713 * xfs_fsop_geom_v1_t. This is a proper subset of the
714 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
715 */
716 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
717 return -XFS_ERROR(EFAULT);
718 return 0;
719 }
720
721 STATIC int
722 xfs_ioc_fsgeometry(
723 xfs_mount_t *mp,
724 void __user *arg)
725 {
726 xfs_fsop_geom_t fsgeo;
727 int error;
728
729 error = xfs_fs_geometry(mp, &fsgeo, 4);
730 if (error)
731 return -error;
732
733 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
734 return -XFS_ERROR(EFAULT);
735 return 0;
736 }
737
738 /*
739 * Linux extended inode flags interface.
740 */
741
742 STATIC unsigned int
743 xfs_merge_ioc_xflags(
744 unsigned int flags,
745 unsigned int start)
746 {
747 unsigned int xflags = start;
748
749 if (flags & FS_IMMUTABLE_FL)
750 xflags |= XFS_XFLAG_IMMUTABLE;
751 else
752 xflags &= ~XFS_XFLAG_IMMUTABLE;
753 if (flags & FS_APPEND_FL)
754 xflags |= XFS_XFLAG_APPEND;
755 else
756 xflags &= ~XFS_XFLAG_APPEND;
757 if (flags & FS_SYNC_FL)
758 xflags |= XFS_XFLAG_SYNC;
759 else
760 xflags &= ~XFS_XFLAG_SYNC;
761 if (flags & FS_NOATIME_FL)
762 xflags |= XFS_XFLAG_NOATIME;
763 else
764 xflags &= ~XFS_XFLAG_NOATIME;
765 if (flags & FS_NODUMP_FL)
766 xflags |= XFS_XFLAG_NODUMP;
767 else
768 xflags &= ~XFS_XFLAG_NODUMP;
769
770 return xflags;
771 }
772
773 STATIC unsigned int
774 xfs_di2lxflags(
775 __uint16_t di_flags)
776 {
777 unsigned int flags = 0;
778
779 if (di_flags & XFS_DIFLAG_IMMUTABLE)
780 flags |= FS_IMMUTABLE_FL;
781 if (di_flags & XFS_DIFLAG_APPEND)
782 flags |= FS_APPEND_FL;
783 if (di_flags & XFS_DIFLAG_SYNC)
784 flags |= FS_SYNC_FL;
785 if (di_flags & XFS_DIFLAG_NOATIME)
786 flags |= FS_NOATIME_FL;
787 if (di_flags & XFS_DIFLAG_NODUMP)
788 flags |= FS_NODUMP_FL;
789 return flags;
790 }
791
792 STATIC int
793 xfs_ioc_fsgetxattr(
794 xfs_inode_t *ip,
795 int attr,
796 void __user *arg)
797 {
798 struct fsxattr fa;
799
800 memset(&fa, 0, sizeof(struct fsxattr));
801
802 xfs_ilock(ip, XFS_ILOCK_SHARED);
803 fa.fsx_xflags = xfs_ip2xflags(ip);
804 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
805 fa.fsx_projid = xfs_get_projid(ip);
806
807 if (attr) {
808 if (ip->i_afp) {
809 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
810 fa.fsx_nextents = ip->i_afp->if_bytes /
811 sizeof(xfs_bmbt_rec_t);
812 else
813 fa.fsx_nextents = ip->i_d.di_anextents;
814 } else
815 fa.fsx_nextents = 0;
816 } else {
817 if (ip->i_df.if_flags & XFS_IFEXTENTS)
818 fa.fsx_nextents = ip->i_df.if_bytes /
819 sizeof(xfs_bmbt_rec_t);
820 else
821 fa.fsx_nextents = ip->i_d.di_nextents;
822 }
823 xfs_iunlock(ip, XFS_ILOCK_SHARED);
824
825 if (copy_to_user(arg, &fa, sizeof(fa)))
826 return -EFAULT;
827 return 0;
828 }
829
830 STATIC void
831 xfs_set_diflags(
832 struct xfs_inode *ip,
833 unsigned int xflags)
834 {
835 unsigned int di_flags;
836
837 /* can't set PREALLOC this way, just preserve it */
838 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
839 if (xflags & XFS_XFLAG_IMMUTABLE)
840 di_flags |= XFS_DIFLAG_IMMUTABLE;
841 if (xflags & XFS_XFLAG_APPEND)
842 di_flags |= XFS_DIFLAG_APPEND;
843 if (xflags & XFS_XFLAG_SYNC)
844 di_flags |= XFS_DIFLAG_SYNC;
845 if (xflags & XFS_XFLAG_NOATIME)
846 di_flags |= XFS_DIFLAG_NOATIME;
847 if (xflags & XFS_XFLAG_NODUMP)
848 di_flags |= XFS_DIFLAG_NODUMP;
849 if (xflags & XFS_XFLAG_PROJINHERIT)
850 di_flags |= XFS_DIFLAG_PROJINHERIT;
851 if (xflags & XFS_XFLAG_NODEFRAG)
852 di_flags |= XFS_DIFLAG_NODEFRAG;
853 if (xflags & XFS_XFLAG_FILESTREAM)
854 di_flags |= XFS_DIFLAG_FILESTREAM;
855 if (S_ISDIR(ip->i_d.di_mode)) {
856 if (xflags & XFS_XFLAG_RTINHERIT)
857 di_flags |= XFS_DIFLAG_RTINHERIT;
858 if (xflags & XFS_XFLAG_NOSYMLINKS)
859 di_flags |= XFS_DIFLAG_NOSYMLINKS;
860 if (xflags & XFS_XFLAG_EXTSZINHERIT)
861 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
862 } else if (S_ISREG(ip->i_d.di_mode)) {
863 if (xflags & XFS_XFLAG_REALTIME)
864 di_flags |= XFS_DIFLAG_REALTIME;
865 if (xflags & XFS_XFLAG_EXTSIZE)
866 di_flags |= XFS_DIFLAG_EXTSIZE;
867 }
868
869 ip->i_d.di_flags = di_flags;
870 }
871
872 STATIC void
873 xfs_diflags_to_linux(
874 struct xfs_inode *ip)
875 {
876 struct inode *inode = VFS_I(ip);
877 unsigned int xflags = xfs_ip2xflags(ip);
878
879 if (xflags & XFS_XFLAG_IMMUTABLE)
880 inode->i_flags |= S_IMMUTABLE;
881 else
882 inode->i_flags &= ~S_IMMUTABLE;
883 if (xflags & XFS_XFLAG_APPEND)
884 inode->i_flags |= S_APPEND;
885 else
886 inode->i_flags &= ~S_APPEND;
887 if (xflags & XFS_XFLAG_SYNC)
888 inode->i_flags |= S_SYNC;
889 else
890 inode->i_flags &= ~S_SYNC;
891 if (xflags & XFS_XFLAG_NOATIME)
892 inode->i_flags |= S_NOATIME;
893 else
894 inode->i_flags &= ~S_NOATIME;
895 }
896
897 #define FSX_PROJID 1
898 #define FSX_EXTSIZE 2
899 #define FSX_XFLAGS 4
900 #define FSX_NONBLOCK 8
901
902 STATIC int
903 xfs_ioctl_setattr(
904 xfs_inode_t *ip,
905 struct fsxattr *fa,
906 int mask)
907 {
908 struct xfs_mount *mp = ip->i_mount;
909 struct xfs_trans *tp;
910 unsigned int lock_flags = 0;
911 struct xfs_dquot *udqp = NULL;
912 struct xfs_dquot *gdqp = NULL;
913 struct xfs_dquot *olddquot = NULL;
914 int code;
915
916 trace_xfs_ioctl_setattr(ip);
917
918 if (mp->m_flags & XFS_MOUNT_RDONLY)
919 return XFS_ERROR(EROFS);
920 if (XFS_FORCED_SHUTDOWN(mp))
921 return XFS_ERROR(EIO);
922
923 /*
924 * Disallow 32bit project ids when projid32bit feature is not enabled.
925 */
926 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
927 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
928 return XFS_ERROR(EINVAL);
929
930 /*
931 * If disk quotas is on, we make sure that the dquots do exist on disk,
932 * before we start any other transactions. Trying to do this later
933 * is messy. We don't care to take a readlock to look at the ids
934 * in inode here, because we can't hold it across the trans_reserve.
935 * If the IDs do change before we take the ilock, we're covered
936 * because the i_*dquot fields will get updated anyway.
937 */
938 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
939 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
940 ip->i_d.di_gid, fa->fsx_projid,
941 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
942 if (code)
943 return code;
944 }
945
946 /*
947 * For the other attributes, we acquire the inode lock and
948 * first do an error checking pass.
949 */
950 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
951 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
952 if (code)
953 goto error_return;
954
955 lock_flags = XFS_ILOCK_EXCL;
956 xfs_ilock(ip, lock_flags);
957
958 /*
959 * CAP_FOWNER overrides the following restrictions:
960 *
961 * The user ID of the calling process must be equal
962 * to the file owner ID, except in cases where the
963 * CAP_FSETID capability is applicable.
964 */
965 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
966 code = XFS_ERROR(EPERM);
967 goto error_return;
968 }
969
970 /*
971 * Do a quota reservation only if projid is actually going to change.
972 */
973 if (mask & FSX_PROJID) {
974 if (XFS_IS_QUOTA_RUNNING(mp) &&
975 XFS_IS_PQUOTA_ON(mp) &&
976 xfs_get_projid(ip) != fa->fsx_projid) {
977 ASSERT(tp);
978 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
979 capable(CAP_FOWNER) ?
980 XFS_QMOPT_FORCE_RES : 0);
981 if (code) /* out of quota */
982 goto error_return;
983 }
984 }
985
986 if (mask & FSX_EXTSIZE) {
987 /*
988 * Can't change extent size if any extents are allocated.
989 */
990 if (ip->i_d.di_nextents &&
991 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
992 fa->fsx_extsize)) {
993 code = XFS_ERROR(EINVAL); /* EFBIG? */
994 goto error_return;
995 }
996
997 /*
998 * Extent size must be a multiple of the appropriate block
999 * size, if set at all. It must also be smaller than the
1000 * maximum extent size supported by the filesystem.
1001 *
1002 * Also, for non-realtime files, limit the extent size hint to
1003 * half the size of the AGs in the filesystem so alignment
1004 * doesn't result in extents larger than an AG.
1005 */
1006 if (fa->fsx_extsize != 0) {
1007 xfs_extlen_t size;
1008 xfs_fsblock_t extsize_fsb;
1009
1010 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1011 if (extsize_fsb > MAXEXTLEN) {
1012 code = XFS_ERROR(EINVAL);
1013 goto error_return;
1014 }
1015
1016 if (XFS_IS_REALTIME_INODE(ip) ||
1017 ((mask & FSX_XFLAGS) &&
1018 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1019 size = mp->m_sb.sb_rextsize <<
1020 mp->m_sb.sb_blocklog;
1021 } else {
1022 size = mp->m_sb.sb_blocksize;
1023 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1024 code = XFS_ERROR(EINVAL);
1025 goto error_return;
1026 }
1027 }
1028
1029 if (fa->fsx_extsize % size) {
1030 code = XFS_ERROR(EINVAL);
1031 goto error_return;
1032 }
1033 }
1034 }
1035
1036
1037 if (mask & FSX_XFLAGS) {
1038 /*
1039 * Can't change realtime flag if any extents are allocated.
1040 */
1041 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1042 (XFS_IS_REALTIME_INODE(ip)) !=
1043 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1044 code = XFS_ERROR(EINVAL); /* EFBIG? */
1045 goto error_return;
1046 }
1047
1048 /*
1049 * If realtime flag is set then must have realtime data.
1050 */
1051 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1052 if ((mp->m_sb.sb_rblocks == 0) ||
1053 (mp->m_sb.sb_rextsize == 0) ||
1054 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1055 code = XFS_ERROR(EINVAL);
1056 goto error_return;
1057 }
1058 }
1059
1060 /*
1061 * Can't modify an immutable/append-only file unless
1062 * we have appropriate permission.
1063 */
1064 if ((ip->i_d.di_flags &
1065 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1066 (fa->fsx_xflags &
1067 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1068 !capable(CAP_LINUX_IMMUTABLE)) {
1069 code = XFS_ERROR(EPERM);
1070 goto error_return;
1071 }
1072 }
1073
1074 xfs_trans_ijoin(tp, ip, 0);
1075
1076 /*
1077 * Change file ownership. Must be the owner or privileged.
1078 */
1079 if (mask & FSX_PROJID) {
1080 /*
1081 * CAP_FSETID overrides the following restrictions:
1082 *
1083 * The set-user-ID and set-group-ID bits of a file will be
1084 * cleared upon successful return from chown()
1085 */
1086 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1087 !capable(CAP_FSETID))
1088 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1089
1090 /*
1091 * Change the ownerships and register quota modifications
1092 * in the transaction.
1093 */
1094 if (xfs_get_projid(ip) != fa->fsx_projid) {
1095 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1096 olddquot = xfs_qm_vop_chown(tp, ip,
1097 &ip->i_gdquot, gdqp);
1098 }
1099 xfs_set_projid(ip, fa->fsx_projid);
1100
1101 /*
1102 * We may have to rev the inode as well as
1103 * the superblock version number since projids didn't
1104 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1105 */
1106 if (ip->i_d.di_version == 1)
1107 xfs_bump_ino_vers2(tp, ip);
1108 }
1109
1110 }
1111
1112 if (mask & FSX_EXTSIZE)
1113 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1114 if (mask & FSX_XFLAGS) {
1115 xfs_set_diflags(ip, fa->fsx_xflags);
1116 xfs_diflags_to_linux(ip);
1117 }
1118
1119 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1120 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1121
1122 XFS_STATS_INC(xs_ig_attrchg);
1123
1124 /*
1125 * If this is a synchronous mount, make sure that the
1126 * transaction goes to disk before returning to the user.
1127 * This is slightly sub-optimal in that truncates require
1128 * two sync transactions instead of one for wsync filesystems.
1129 * One for the truncate and one for the timestamps since we
1130 * don't want to change the timestamps unless we're sure the
1131 * truncate worked. Truncates are less than 1% of the laddis
1132 * mix so this probably isn't worth the trouble to optimize.
1133 */
1134 if (mp->m_flags & XFS_MOUNT_WSYNC)
1135 xfs_trans_set_sync(tp);
1136 code = xfs_trans_commit(tp, 0);
1137 xfs_iunlock(ip, lock_flags);
1138
1139 /*
1140 * Release any dquot(s) the inode had kept before chown.
1141 */
1142 xfs_qm_dqrele(olddquot);
1143 xfs_qm_dqrele(udqp);
1144 xfs_qm_dqrele(gdqp);
1145
1146 return code;
1147
1148 error_return:
1149 xfs_qm_dqrele(udqp);
1150 xfs_qm_dqrele(gdqp);
1151 xfs_trans_cancel(tp, 0);
1152 if (lock_flags)
1153 xfs_iunlock(ip, lock_flags);
1154 return code;
1155 }
1156
1157 STATIC int
1158 xfs_ioc_fssetxattr(
1159 xfs_inode_t *ip,
1160 struct file *filp,
1161 void __user *arg)
1162 {
1163 struct fsxattr fa;
1164 unsigned int mask;
1165
1166 if (copy_from_user(&fa, arg, sizeof(fa)))
1167 return -EFAULT;
1168
1169 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1170 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1171 mask |= FSX_NONBLOCK;
1172
1173 return -xfs_ioctl_setattr(ip, &fa, mask);
1174 }
1175
1176 STATIC int
1177 xfs_ioc_getxflags(
1178 xfs_inode_t *ip,
1179 void __user *arg)
1180 {
1181 unsigned int flags;
1182
1183 flags = xfs_di2lxflags(ip->i_d.di_flags);
1184 if (copy_to_user(arg, &flags, sizeof(flags)))
1185 return -EFAULT;
1186 return 0;
1187 }
1188
1189 STATIC int
1190 xfs_ioc_setxflags(
1191 xfs_inode_t *ip,
1192 struct file *filp,
1193 void __user *arg)
1194 {
1195 struct fsxattr fa;
1196 unsigned int flags;
1197 unsigned int mask;
1198
1199 if (copy_from_user(&flags, arg, sizeof(flags)))
1200 return -EFAULT;
1201
1202 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1203 FS_NOATIME_FL | FS_NODUMP_FL | \
1204 FS_SYNC_FL))
1205 return -EOPNOTSUPP;
1206
1207 mask = FSX_XFLAGS;
1208 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1209 mask |= FSX_NONBLOCK;
1210 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1211
1212 return -xfs_ioctl_setattr(ip, &fa, mask);
1213 }
1214
1215 STATIC int
1216 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1217 {
1218 struct getbmap __user *base = *ap;
1219
1220 /* copy only getbmap portion (not getbmapx) */
1221 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1222 return XFS_ERROR(EFAULT);
1223
1224 *ap += sizeof(struct getbmap);
1225 return 0;
1226 }
1227
1228 STATIC int
1229 xfs_ioc_getbmap(
1230 struct xfs_inode *ip,
1231 int ioflags,
1232 unsigned int cmd,
1233 void __user *arg)
1234 {
1235 struct getbmapx bmx;
1236 int error;
1237
1238 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1239 return -XFS_ERROR(EFAULT);
1240
1241 if (bmx.bmv_count < 2)
1242 return -XFS_ERROR(EINVAL);
1243
1244 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1245 if (ioflags & IO_INVIS)
1246 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1247
1248 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1249 (struct getbmap *)arg+1);
1250 if (error)
1251 return -error;
1252
1253 /* copy back header - only size of getbmap */
1254 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1255 return -XFS_ERROR(EFAULT);
1256 return 0;
1257 }
1258
1259 STATIC int
1260 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1261 {
1262 struct getbmapx __user *base = *ap;
1263
1264 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1265 return XFS_ERROR(EFAULT);
1266
1267 *ap += sizeof(struct getbmapx);
1268 return 0;
1269 }
1270
1271 STATIC int
1272 xfs_ioc_getbmapx(
1273 struct xfs_inode *ip,
1274 void __user *arg)
1275 {
1276 struct getbmapx bmx;
1277 int error;
1278
1279 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1280 return -XFS_ERROR(EFAULT);
1281
1282 if (bmx.bmv_count < 2)
1283 return -XFS_ERROR(EINVAL);
1284
1285 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1286 return -XFS_ERROR(EINVAL);
1287
1288 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1289 (struct getbmapx *)arg+1);
1290 if (error)
1291 return -error;
1292
1293 /* copy back header */
1294 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1295 return -XFS_ERROR(EFAULT);
1296
1297 return 0;
1298 }
1299
1300 /*
1301 * Note: some of the ioctl's return positive numbers as a
1302 * byte count indicating success, such as readlink_by_handle.
1303 * So we don't "sign flip" like most other routines. This means
1304 * true errors need to be returned as a negative value.
1305 */
1306 long
1307 xfs_file_ioctl(
1308 struct file *filp,
1309 unsigned int cmd,
1310 unsigned long p)
1311 {
1312 struct inode *inode = filp->f_path.dentry->d_inode;
1313 struct xfs_inode *ip = XFS_I(inode);
1314 struct xfs_mount *mp = ip->i_mount;
1315 void __user *arg = (void __user *)p;
1316 int ioflags = 0;
1317 int error;
1318
1319 if (filp->f_mode & FMODE_NOCMTIME)
1320 ioflags |= IO_INVIS;
1321
1322 trace_xfs_file_ioctl(ip);
1323
1324 switch (cmd) {
1325 case FITRIM:
1326 return xfs_ioc_trim(mp, arg);
1327 case XFS_IOC_ALLOCSP:
1328 case XFS_IOC_FREESP:
1329 case XFS_IOC_RESVSP:
1330 case XFS_IOC_UNRESVSP:
1331 case XFS_IOC_ALLOCSP64:
1332 case XFS_IOC_FREESP64:
1333 case XFS_IOC_RESVSP64:
1334 case XFS_IOC_UNRESVSP64:
1335 case XFS_IOC_ZERO_RANGE: {
1336 xfs_flock64_t bf;
1337
1338 if (copy_from_user(&bf, arg, sizeof(bf)))
1339 return -XFS_ERROR(EFAULT);
1340 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1341 }
1342 case XFS_IOC_DIOINFO: {
1343 struct dioattr da;
1344 xfs_buftarg_t *target =
1345 XFS_IS_REALTIME_INODE(ip) ?
1346 mp->m_rtdev_targp : mp->m_ddev_targp;
1347
1348 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1349 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1350
1351 if (copy_to_user(arg, &da, sizeof(da)))
1352 return -XFS_ERROR(EFAULT);
1353 return 0;
1354 }
1355
1356 case XFS_IOC_FSBULKSTAT_SINGLE:
1357 case XFS_IOC_FSBULKSTAT:
1358 case XFS_IOC_FSINUMBERS:
1359 return xfs_ioc_bulkstat(mp, cmd, arg);
1360
1361 case XFS_IOC_FSGEOMETRY_V1:
1362 return xfs_ioc_fsgeometry_v1(mp, arg);
1363
1364 case XFS_IOC_FSGEOMETRY:
1365 return xfs_ioc_fsgeometry(mp, arg);
1366
1367 case XFS_IOC_GETVERSION:
1368 return put_user(inode->i_generation, (int __user *)arg);
1369
1370 case XFS_IOC_FSGETXATTR:
1371 return xfs_ioc_fsgetxattr(ip, 0, arg);
1372 case XFS_IOC_FSGETXATTRA:
1373 return xfs_ioc_fsgetxattr(ip, 1, arg);
1374 case XFS_IOC_FSSETXATTR:
1375 return xfs_ioc_fssetxattr(ip, filp, arg);
1376 case XFS_IOC_GETXFLAGS:
1377 return xfs_ioc_getxflags(ip, arg);
1378 case XFS_IOC_SETXFLAGS:
1379 return xfs_ioc_setxflags(ip, filp, arg);
1380
1381 case XFS_IOC_FSSETDM: {
1382 struct fsdmidata dmi;
1383
1384 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1385 return -XFS_ERROR(EFAULT);
1386
1387 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1388 dmi.fsd_dmstate);
1389 return -error;
1390 }
1391
1392 case XFS_IOC_GETBMAP:
1393 case XFS_IOC_GETBMAPA:
1394 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1395
1396 case XFS_IOC_GETBMAPX:
1397 return xfs_ioc_getbmapx(ip, arg);
1398
1399 case XFS_IOC_FD_TO_HANDLE:
1400 case XFS_IOC_PATH_TO_HANDLE:
1401 case XFS_IOC_PATH_TO_FSHANDLE: {
1402 xfs_fsop_handlereq_t hreq;
1403
1404 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1405 return -XFS_ERROR(EFAULT);
1406 return xfs_find_handle(cmd, &hreq);
1407 }
1408 case XFS_IOC_OPEN_BY_HANDLE: {
1409 xfs_fsop_handlereq_t hreq;
1410
1411 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1412 return -XFS_ERROR(EFAULT);
1413 return xfs_open_by_handle(filp, &hreq);
1414 }
1415 case XFS_IOC_FSSETDM_BY_HANDLE:
1416 return xfs_fssetdm_by_handle(filp, arg);
1417
1418 case XFS_IOC_READLINK_BY_HANDLE: {
1419 xfs_fsop_handlereq_t hreq;
1420
1421 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1422 return -XFS_ERROR(EFAULT);
1423 return xfs_readlink_by_handle(filp, &hreq);
1424 }
1425 case XFS_IOC_ATTRLIST_BY_HANDLE:
1426 return xfs_attrlist_by_handle(filp, arg);
1427
1428 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1429 return xfs_attrmulti_by_handle(filp, arg);
1430
1431 case XFS_IOC_SWAPEXT: {
1432 struct xfs_swapext sxp;
1433
1434 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1435 return -XFS_ERROR(EFAULT);
1436 error = xfs_swapext(&sxp);
1437 return -error;
1438 }
1439
1440 case XFS_IOC_FSCOUNTS: {
1441 xfs_fsop_counts_t out;
1442
1443 error = xfs_fs_counts(mp, &out);
1444 if (error)
1445 return -error;
1446
1447 if (copy_to_user(arg, &out, sizeof(out)))
1448 return -XFS_ERROR(EFAULT);
1449 return 0;
1450 }
1451
1452 case XFS_IOC_SET_RESBLKS: {
1453 xfs_fsop_resblks_t inout;
1454 __uint64_t in;
1455
1456 if (!capable(CAP_SYS_ADMIN))
1457 return -EPERM;
1458
1459 if (mp->m_flags & XFS_MOUNT_RDONLY)
1460 return -XFS_ERROR(EROFS);
1461
1462 if (copy_from_user(&inout, arg, sizeof(inout)))
1463 return -XFS_ERROR(EFAULT);
1464
1465 /* input parameter is passed in resblks field of structure */
1466 in = inout.resblks;
1467 error = xfs_reserve_blocks(mp, &in, &inout);
1468 if (error)
1469 return -error;
1470
1471 if (copy_to_user(arg, &inout, sizeof(inout)))
1472 return -XFS_ERROR(EFAULT);
1473 return 0;
1474 }
1475
1476 case XFS_IOC_GET_RESBLKS: {
1477 xfs_fsop_resblks_t out;
1478
1479 if (!capable(CAP_SYS_ADMIN))
1480 return -EPERM;
1481
1482 error = xfs_reserve_blocks(mp, NULL, &out);
1483 if (error)
1484 return -error;
1485
1486 if (copy_to_user(arg, &out, sizeof(out)))
1487 return -XFS_ERROR(EFAULT);
1488
1489 return 0;
1490 }
1491
1492 case XFS_IOC_FSGROWFSDATA: {
1493 xfs_growfs_data_t in;
1494
1495 if (copy_from_user(&in, arg, sizeof(in)))
1496 return -XFS_ERROR(EFAULT);
1497
1498 error = xfs_growfs_data(mp, &in);
1499 return -error;
1500 }
1501
1502 case XFS_IOC_FSGROWFSLOG: {
1503 xfs_growfs_log_t in;
1504
1505 if (copy_from_user(&in, arg, sizeof(in)))
1506 return -XFS_ERROR(EFAULT);
1507
1508 error = xfs_growfs_log(mp, &in);
1509 return -error;
1510 }
1511
1512 case XFS_IOC_FSGROWFSRT: {
1513 xfs_growfs_rt_t in;
1514
1515 if (copy_from_user(&in, arg, sizeof(in)))
1516 return -XFS_ERROR(EFAULT);
1517
1518 error = xfs_growfs_rt(mp, &in);
1519 return -error;
1520 }
1521
1522 case XFS_IOC_GOINGDOWN: {
1523 __uint32_t in;
1524
1525 if (!capable(CAP_SYS_ADMIN))
1526 return -EPERM;
1527
1528 if (get_user(in, (__uint32_t __user *)arg))
1529 return -XFS_ERROR(EFAULT);
1530
1531 error = xfs_fs_goingdown(mp, in);
1532 return -error;
1533 }
1534
1535 case XFS_IOC_ERROR_INJECTION: {
1536 xfs_error_injection_t in;
1537
1538 if (!capable(CAP_SYS_ADMIN))
1539 return -EPERM;
1540
1541 if (copy_from_user(&in, arg, sizeof(in)))
1542 return -XFS_ERROR(EFAULT);
1543
1544 error = xfs_errortag_add(in.errtag, mp);
1545 return -error;
1546 }
1547
1548 case XFS_IOC_ERROR_CLEARALL:
1549 if (!capable(CAP_SYS_ADMIN))
1550 return -EPERM;
1551
1552 error = xfs_errortag_clearall(mp, 1);
1553 return -error;
1554
1555 default:
1556 return -ENOTTY;
1557 }
1558 }
kernel source for telekom puls (alcatel/mediatek)